The act of going home with a person with the sole intention of engaging in sexual intercourse. When the host leaves the room to clean up or use the restroom, the guest hurridly makes their leave unaware to the host.
After finishing the vigorous bout of sex, Sarah went to the bathroom to clean up. Steve gathered his things and headed out the window leaving Sarah with the curtains flapping in the wind. Unbeknownst to Sarah, Steve had planned the bash and dash from the beginning.